(19)
(11) EP 0 653 799 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
20.12.1995 Bulletin 1995/51

(43) Date of publication A2:
17.05.1995 Bulletin 1995/20

(21) Application number: 94115665.5

(22) Date of filing: 05.10.1994
(51) International Patent Classification (IPC)6: H01P 1/32, H01P 1/387
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 12.10.1993 JP 254490/93

(71) Applicant: MURATA MANUFACTURING CO., LTD.
Nagaokakyo-shi Kyoto-fu 226 (JP)

(72) Inventors:
  • Marusawa,Hiroshi
    Nagaokakyo-shi,Kyoto-fu (JP)
  • Kawanami,Takashi
    Nagaokakyo-shi,Kyoto-fu (JP)
  • Konoike,Takehiro
    Nagaokakyo-shi,Kyoto-fu (JP)
  • Tomono,Kunisaburo
    Nagaokakyo-shi,Kyoto-fu (JP)

(74) Representative: TER MEER - MÜLLER - STEINMEISTER & PARTNER 
Mauerkircherstrasse 45
81679 München
81679 München (DE)


(56) References cited: : 
   
       


    (54) High-frequency use non-reciprocal circuit element


    (57) A high-frequency use non-reciprocal circuit includes a sintered body (18) which is a high-frequency use magnetic body obtained by a ceramic lamination/integral firing technique, a plurality of central electrodes (8a, 8b to 10a, 10b) which are arranged in the sintered body (18) to be separated from each other through a magnetic layer while intersecting with each other at central portions, and electrodes (11a to 16b) for deriving impedance-matching capacitance which are formed in the vicinity of the intersecting portion to be in series with the central electrodes (8a, 8b to 10a, 10b). The magnetic layer provided between the central electrodes serves as an insulating layer for electrically insulating the central electrodes from each other, a high-frequency use magnetic layer, and a material layer for deriving the impedance-matching capacitance.






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